Platform:
 

Alien (Atari 2600)

1 available, 4 wanted, 4 collection
Alien Trilogy (PlayStation)

Alien Trilogy (PlayStation)

8 available, 5 wanted, 7 collection
Alien Hominid (PlayStation 2)

Alien Hominid (PlayStation 2)

5 available, 8 wanted, 10 collection
 

Alien (VIC-20)

1 available, 0 wanted, 0 collection
Alien Storm (Genesis)

Alien Storm (Genesis)

3 available, 16 wanted, 10 collection
Alien Hominid (GameCube)

Alien Hominid (GameCube)

4 available, 15 wanted, 23 collection
 

Alien (Watara Supervision)

0 available, 0 wanted, 0 collection
Alien Soldier (Mega Drive)

Alien Soldier (Mega Drive)

2 available, 18 wanted, 3 collection
Alien Syndrome (Nintendo Entertainment System)

Alien Syndrome (Nintendo Entertainment System)

6 available, 7 wanted, 8 collection
Alien Syndrome (Sega Master System)

Alien Syndrome (Sega Master System)

8 available, 2 wanted, 13 collection
Alien Crush (NEC TurboGrafx-16)

Alien Crush (NEC TurboGrafx-16)

6 available, 7 wanted, 22 collection
Alien vs. Predator (Super Nintendo)

Alien vs. Predator (Super Nintendo)

2 available, 14 wanted, 8 collection
Alien vs. Predator (Jaguar)

Alien vs. Predator (Jaguar)

5 available, 4 wanted, 13 collection
Alien 3 (Genesis)

Alien 3 (Genesis)

9 available, 7 wanted, 9 collection
Contra: The Alien Wars (Game Boy)

Contra: The Alien Wars (Game Boy)

2 available, 9 wanted, 9 collection
Contra III: The Alien Wars (Super Nintendo)

Contra III: The Alien Wars (Super Nintendo)

15 available, 55 wanted, 67 collection
Zak McKracken and the Alien Mindbenders (PC)

Zak McKracken and the Alien Mindbenders (PC)

3 available, 10 wanted, 4 collection
Contra Advance: The Alien Wars EX (Game Boy Advance)

Contra Advance: The Alien Wars EX (Game Boy Advance)

2 available, 15 wanted, 10 collection
Alien Incident (PC)

Alien Incident (PC)

2 available, 4 wanted, 12 collection
Alien Logic (PC)

Alien Logic (PC)

4 available, 0 wanted, 5 collection
 

Alien: Isolation (Xbox One)

2 available, 8 wanted, 0 collection
Alien: Resurrection (PlayStation)

Alien: Resurrection (PlayStation)

5 available, 2 wanted, 7 collection
Alien Syndrome (Nintendo Wii)

Alien Syndrome (Nintendo Wii)

8 available, 1 wanted, 9 collection